Encore by CHAI vs Smile Detection
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Encore by CHAI
This app supports individuals recovering from vocal cord treatment by tracking vocal ability over 24 weeks. Users complete short surveys and record their voice to monitor progress through visual graphs. It provides health information but advises consulting a doctor for medical decisions.
- Vocal ability tracking
- Short surveys
- Voice recording
- Progress monitoring graphs
- 24-week tracking period
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Encore is a general wellness app designed for users that have undergone surgery/treatment that affects vocal cord ability. For up to 24 weeks, users answer a 2-3 short surveys relating to their vocal cord ability. Users will also record their voice at various timepoints over the 24 weeks. Graphs will help users monitor their progress over time. This app delivers health related information. In addition to using this app, please seek a doctor’s advice before making any medical decisions.
Smile Detection
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Facial expressions are analyzed in real time to determine whether or not a person is smiling.
Screenshots
Verdict
The clearest difference is ads: Encore by CHAI at none against Smile Detection's shown. Encore by CHAI also leads on iOS requirement (13.0 vs 17.7.2). Smile Detection's advantage is update cadence (every 2 weeks vs every 11 months). On price, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Encore by CHAI ships an update every 11 months, Smile Detection every 2 weeks. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.
| Parameter | Encore by CHAI | Smile Detection |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 11 months | Every 2 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 17.7.2 |
| Further details — not scored | ||
| Size | 6 MB | 35 MB |
| Age rating | 4+ | 4+ |
| Developer | University of North Carolina at Chapel Hill | Hideaki Uchikoshi |
In-app purchases
Encore by CHAI
No in-app purchases
Smile Detection
No in-app purchases
